package com.atguigu.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;
import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {
    //正常访问，肯定ok的方法
    public String papymentInfo_OK(Integer id){
        return "线程池:"+Thread.currentThread().getName()+" paymentInfo_OK,id:"+id+"\t";
    }

    //超时方法
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds",value = "5000")
    })
    public String paymentInfo_TimeOut(Integer id){
        int timeNumber = 3000;
        // int timeNumber = 10/0;
        try {
            TimeUnit.SECONDS.sleep(timeNumber);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "线程池： " + Thread.currentThread().getName() + " PaymenyInfo_TimeOut,id: " + id + "\t" + "O(∩_∩)O哈哈~" + " 耗时" + timeNumber + "毫秒";
    }

    public String paymentInfo_TimeOutHandler(Integer id) {
        return "线程池： " + Thread.currentThread().getName() + " 8001系统繁忙系统报错,请稍后再试id: " + id + "\t" + "( Ĭ ^ Ĭ )";
    }

    //CircuitBreaker断路器，测试步骤
    /*首先访问http://localhost:8001/payment/circuit/1正常返回结果
    *然后访问http://localhost:8001/payment/circuit/-1，一直重复刷新访问这个错误结果
    *当错误率达到60%.之后再访问http://localhost:8001/payment/circuit/1结果还是错误结果，因为已经熔断了
    * 但是，过10000之后会慢慢恢复，重新访问http://localhost:8001/payment/circuit/1结果又恢复正确了
    * */
    //服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",
            commandProperties ={
              @HystrixProperty(name="circuitBreaker.enabled",value="true"),//是否开启断路器
              @HystrixProperty(name="circuitBreaker.requestVolumeThreshold",value="10"),//请求次数
              @HystrixProperty(name="circuitBreaker.sleepWindowInMilliseconds",value="10000"),//时间窗口期
              @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60")//失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id){
        if(id < 0){
            throw new RuntimeException("******id 不能为负数");
        }
        //hutool工具包，在cloud-api-commons的pom中已经引入
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName()+"\t"+"调用成功，流水号："+serialNumber;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id){
        return "id不能为负数，请稍后再试，┭┮﹏┭┮ ,id:"+id;
    }

}
